Every time the rectangles moved, the words in one of them disappeared. leaving an empty space in which new words were typed.

"To their great joy the trees became thinner the farther they advanced, and in the afternoon they suddenly came upon a broad river, flowing swiftly just before them. On the other side of the water they could see the road of yellow brick running through a beautiful country, with green meadows dotted with bright flowers and all the road bordered with trees hanging full of delicious fruits. They were greatly pleased to see this delightful country before them."